Ransomware Resistance Tests in OT/ICS | Attack Simulation | nFlo.

OT/ICS ransomware resistance tests

We’ll test whether a ransomware attack can stop your production and test your team’s readiness for a worst-case scenario. We will use our secure ransomware simulator to assess the resilience of your SCADA, HMI and PLC systems, without any risk to your current operations.

“Fire drill” tests for the manufacturing and energy sectors

OT incident response expert team

Safe and controlled simulation


In the OT network, ransomware does not encrypt files. It stops production.

A ransomware attack on an office (IT) network is a problem. The same attack on a manufacturing (OT) network is a disaster. The goal of the attackers is not to steal data, but to bring physical paralysis to the factory and extort a ransom to restore manufacturing capability.

Ransomware is now the #1 threat to industrial companies, accounting for more than 50% of all cyber attacks on the OT sector.

True story: how encrypted HMI panels stopped a food factory

At a large food factory, a ransomware attack that began with an email in the office made its way into the production network. The hackers were not interested in file servers. Instead, their software encrypted the operating systems on more than a dozen HMI panels controlling the packaging line.

Although the company had data backups, no one had a tested procedure for restoring entire operator stations under emergency conditions.

The result? A complete shutdown of production for 4 days, losses due to spoiled goods and contractual penalties for late deliveries. The company paid the ransom not for the data, but for the ability to restart the factory.

Do you know how many hours or days it will take your team to safely restore PLCs and HMI systems from backup when every minute of downtime costs tens of thousands?


Our solution: a safe “fire drill” for your factory

Our service is a market-unique, controlled simulation of a ransomware attack, designed specifically for vulnerable OT environments. We securely test the entire line of defense: from technical safeguards to procedures to team response and competence in the face of a crisis.

Our approach is based on 3 pillars:

Safe simulation in an OT environment

Our proprietary, harmless software runs on older systems (e.g. Windows XP/7) without affecting their stability and without real encryption.

Verification of the resilience of control systems

We focus the attack on the weakest points: engineering stations, SCADA servers and HMI panels. We verify that the security features work.

Test of response and recovery procedures

We examine readiness for real-world challenges: How to isolate a segment? How to restore the PLC? Are SCADA/HMI backups uninfected?


Our immunity testing process in 5 steps

Each simulation is a carefully planned exercise that brings maximum knowledge with zero risk.

Step 1

Selecting a safe area for simulation

Together with you, we define the goals and choose a safe area to conduct the test (e.g. one production line or test environment).

Step 2

Controlled launch of the simulator

On the agreed date and at the selected HMI or engineering station, we launch our secure simulator, starting the exercise.

Step 3

Observe the reaction of the technology and the team

Our experts monitor the simulation, taking notes on how the security systems behave and how your integrated response team progresses.

Step 4

Test of restoration procedures for OT systems

Once the simulation is complete, we move on to verify whether and how quickly your team is able to restore the “scrambled” systems and restore continuity.

Step 5

Report with “homework”

You receive a detailed report with practical conclusions and recommendations for improving technical safeguards and procedures.


What does your business gain? Proven operational resilience

An investment in a ransomware resistance test is an investment in your company’s ability to survive the most serious crisis.

Actual verification of crisis preparedness

Gain confidence that your IR/DR plans work not only on paper, but also under the pressure of a simulated, real-world incident.

Rehearse and strengthen the team

The experience gained by the IT and security team during the simulation is invaluable. They learn to work together, which reduces response time during an attack.

Identify weaknesses in your backup strategy

Verify that your backups are adequately isolated and that you can realistically restore key systems in an acceptable time (RTO/RPO).

A strong argument in negotiations with insurers

Having evidence of regular, hands-on testing of ransomware resilience can lower cyber-risk insurance premiums.

Stop relying on tribal knowledge. Start building systemic security.

Contact us to discuss how we can help you create a consistent and practical security management framework that will structure your operations, secure key knowledge, and realistically strengthen your organization.

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